Train-stopping apparatus



W. B. MURRAY. TRAIN STOPPIN'G APPARATUS.

APPLICATION FILED MAY 5, 1918.

www. 3@ m. @Axt w f m m [mv/m mmm. w\. Lw... G\\. .M04 @i N E m AN M QAm a A. m. m WIN. mu@ \MJ D@ .mln/ 5. 2 o, 1. w. 3 4, W 1 @A W. B.MURRAY. TRAIN sToPPING APPARATUS.

4 `APPLICATION FILED MAY 6, IBIS. 1,431.025.

Patented Oct. 3, 1922.

3 SHEETS-SHEET 2.

SHEETSWSHEET 3.

Patented Oct. 3

W A ATA @512mm JB. Harvey,

w. B. MURRAY. TRAIN STOPPING APPARATUS. APPLICATION FILED MAY 6', i918.

Tg5 A P5 Patented @et 3, 1922.

WILLIAM B. MURRAY, or nnivvrnnn, rLLrNors, essrenos'ro Lanai Tian,MILLER TRAIN CONTROLCQRPORATION, OF STAUNTKON, VIRGNIA, A`C()ltPOIR/A'llfoN OF VIIEi/GINIAy TRArN-srorrrne larranarus,

1 Application lerl May 6,.1918. Serial No. 232,805. f

To all whom t may yconcer/n: `.Be itknownthatl, WILLIAM B. ll/lnmmr,

a citizen ofthe United States, residing at Danville, in the countyyofvVermilionand` State of Illinois, have'invented ,certain new and usefullmprovementsin Train-Stopping Apparatus, of which the following is aspeciiication. H s.

' My invention relates to` train stopping means, and has particularreferenceto the apparatus which contacts with a ramp and is mechanicallyo perated therebyl The present application is, inlpart, a con-ytinuation of my copendingrapplication.Serial No. 40,751, filed January19, 1915, now Patent No. 1,337,255, dated April 20, 1920.`

An'importan't object ofthe invention is to provide apparatusof the abovementioned character, which` is offsimpliiied-construction,and dispenseswith they employment of an kunnecessarily large number' of parts.

.A further object of the invention is to provide means whereby thepressure which is to be' released by the shoe ybeing moved by the ramp,normally serves to retain the shoe in the lowermost position, andyieldingly opposes its upward movement. 1

A further object of the invention is to provide means toV exhaustpressure .upon the apparatus, to stop the train, if the shoe propershould workloose` or become separated from the reciprocatory barcarrying the same.'` f' @ther objects and advantages of the inventionwill be apparent during'` the of the following, description. f

In the accompanying drawings forming a part of this specification and inwhich like numerals are employed to designate like parts throughout thesame, v

Figure 1 is a side elevation of apparatus embodying-.my invention, partsbeing shown in central vertical section, i l

Figure 2 is a horizontal taken on line 2e2`of Figure y1f, i

Figure 3 is a similar,` viewy takenon line 3-3 of Figure 1, l, V j

sectional view i Figure lisa side elevation of ratus, parts being shownin section,

Figure 5 isahorizontal section taken on line 5-5 of Figure 4, f

lFigure 6 is a cent-ralV vertical sectional View` through the `shoe andi associated *elements, 1; I

F igure 7 is arsectional view taken online 7]-7 of Figure 6, 1

Figure 8 is an enlarged sectional view through the pressureoperatedapparatus to actuate the train stopping'means, parts` in elevation,Figure 9 is a bottom plan view of theshoe insert, and 1' Figure 10 is a`partly diagrammatic view of a ramp and associated circuit.

In the drawings, wherein for the purpose of illustration is shown apreferred embodi ment of myinvention, the numeral 10 designates avertically arranged guide, as a whole, comprising a cylinder 11,` whichis preferably cast integral with aplate or foundation 12. The plate 12is provided with slots 12, to receivefbolts (not shown), to clamp theplate to the framework ofthe engine or the tender. rlhe plate 12 isinsulated from the yframe-work of the engineby any suitablemeans. Theupper end of the cylinder 11is closed byme'ans of a cap or head 13.

having an air tightuconnection therewith'.`

and secured thereto, by means of bolts 14 or the like. i, 1.

The cylinderl 11 is provided with a depending extension 15, having anopening or bore 16, provided with curved ;ends18,` as shown 'more'clearly in Figure 2. The extension 15 has grooves 15, upon its ilatsides, and an airport 17, upon one iiat side. The port 17 has its lowerend in communication with the'atmosphere,

while its upper end leadsinto the lower endy of the cylinder .11,beneaththe piston 21, asv

clearly` shown in F igurc 7. Depending from the cylinderertension 15`are oppositelyarranged guide-ways 19having transversely f curved faces20, as clearly shown in Figurey the appai fiat sides 17 and` 3. Thesides of the guide-ways 19 are flush with the flat sides or faces 24, asshown.

Mounted to reciprocate within the cylinder 11 is the piston or pistonvalve 21, havino' packing 22, for forming an air tight it. he piston isarranged upon the upper end of a vertically movable bar 23, which hasflattened sides 24 and transversely curved. edges 25,. as-clearly shownin Figures 2 and3.. This bar is-adapted to move within the cylinderextension 15 and.also.v

between the guides 19. The bar 23 is `provided at its upper endwith areducediextension 26, adapted to pass through an'opening 27 in thepiston 21. lThis reduced extension is externally screw-threaded for thereception of a nut 28 whichy engages a washer 29, in turn holding thepacking 22 upon the piston 21, andthe piston upon the upper end ofthe-bar 23. y v

The bar 23 is vprovided with a longitudinally extending port upper endof the extension 26 thereof, and discharging-at its4 lower 'end into theupper end of a recess or chamber 31,` formedgin vthe bar 23. Arrangedwithin the recess 31 is a valve seat 32, adapted to engage with anupwardly seating valve 33, having a stem 34. This stem vis surrounded bya compressible coil spring 35, serving to hold the Y valve seated.

'The springf35 contacts with the upper side or face of a shoe 36,provided at or near one longitudinal edge with a vertical extensionplate 37, preferably cast integral therewith.` This extension plate isbolted or otherwise rigidly clamped to the lower end of the bar 23 `bybolts 38 or the like. It might be stated at this point, that should theshoe 36 work loose so that it would descend rperceptibly with respect tothe bar 23, or become separated from the bar 23, the pressure within thechamber 31would unseat the valve 33,"thus allowing the pressure toescape to the atmosphere.

As more `clearly shown in 'Figures 6 and .7, thelshoe 36 is providedwith a depending longitudinal flange 39,' having la tapered inner face40. Arranged opposite the Hange 39 is a detachable plate 41, having aninclined face 42 and adapted to coact with the H ange 39.` This plate isadaptedfto engage the opposite edge of the shoe 36 and is provided withan over-hanging flange 43.` The flange 39 and plate 41 have openings 44,The flange 39 and plate 41 serve to receive therebetween a hard ironinsert 47 which is clamped lto the same. From the forego-ingdescription, it is Vobvious that if the insert 47 should drop out orbecome displaced,

without injury to the shoe 36, the valve 33 ywould not beopened. Theinsert 47 is provided upon its lower contacting face with a diagonallyarranged groove 48, preferably A stopped. Leadingsinto 30, passingthrough the ciprocate within the cylinder is a piston 53, Y

having a contracted port v54. The piston 53 is connected with a rod,whichl is connected with train stopping means 56. When lthe piston 53descends, the train stopping means 56 is actuated and the engine ortrain the lower endl of the cylinder 50 is an outlet port 57 discharginginto a chamber 581'. The chamber 58 is adapted to exhaust into thechamber 59',

leading into av pipe 60', which leads into a chamber 61, preferably castupon the cylinder111, as more clearly shown in Figure 5. The ,chamber 61has communication with the lower endv of 'the cylinder 11, abovethepis-V ton 21 by means of ports 62.

The numeral 63 designates a contracted port, disposed between thechamber 58 and chamber 59. The chamber 58 has communicationwith thechamber 59 through means of `a main port 64, adapted to be covered anduncoveredby an upwardly seating valve 65, carrying adownwardly rseatingvalve 66, adaptediwli'en iny the lowermost position to cover a -porty67, supplying air to awhistle 68. The valve'65 is connected with avertically movable rod 69 connected with the core 69 of a solenoid 70.The port 63 is not suiticientlyslarge to permit of the exhaustoffpressure from beneath the piston 53, in suicient volume to cause thepiston 53 to descend. The ports 63 are preferably about of an inch indiameter. i

One end of the winding of the solenoid 70 is connected with a'wire 71,which is connected with the plate 12, as shown at 72. The opposite end'rof the winding of the solenoid `70 is grounded to the frame-work of theengine or tender, as shown at 73.

`The numeral 74- designates `a source ofy with a rail 76 of the track bymeans-of p a wire 77. A

Thefoperation. of the apparatus is as follows: y

Then the shoe 36 travels in proximity to the ramp 7 5, and therampiselectrically connected with the source .of current 74, as would be thecase if the block were clear, the shoe '130 36 contacts with the ramp75, which thereby closes a circuit to energize the solenoid winding 70.lnthis closed circuit current liows from one pole of the source ofcurrent 7e,

through wire 76, ramp 75, shoe 36, wire 71,

solenoid winding 70, wire 73, the frame-work of the engine, rail 76, andback through the wire 77 to the opposite pole of the source of current74. When the solenoid is thus energized the valve 64 is seated, therebycutting olf .communication between the chambers 58 and 59. The shoe 36and bar 23 are now moved upwardly hy the ramp 75, and the piston valve2l will be shifted above the chamber 6l and series of apertures 62. As aresult of this movement, the chamber 6l is placed into communicationwith the port 17', which leads to the atmosphere, whereby the pipe 60 isplaced in communication with the atmosphere. However, as the valve 65 isseated, pressure will not now eX- haust from beneath the piston 53,sufficiently, to cause the piston to descend, to actuate the trainstopping means 56.

Assuming that the ramp is disconnected from its source of current, aswhen the block is at danger, when the bar 23 was elevated, by contact ofthe shoe with the ramp, as above stated, the piston valve 21 would beelevated above the chamber 6l, and this chamber placed in communicationwith the atmosphere through the post 17. The valve 65 would now remainunseated, thereby allowing pressure to exhaust to the atmosphere beneaththe piston 53. The piston would now descend and actuate the trainstopping means 56.

It is to be understood that the form of my invention herewith shown anddescribed is to he taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of the subjoined claims.

Having thus described my invention, I claim:

' l. In apparatus of the character described, an upstanding cylinderadapted to be secured to a vehicle, an extension formed on the lower endof said cylinder and having a port therein communicating with theatmosphere and rwith the lower end of said cylinder, a piston mounted toreciprocate within the cylinder, a bar connected with the piston andextending through said extension, means to move the bar, a conduitconnected with the cylinder, and leading into the same at a point nearthe lower end, pressure operated train stopping means connected withsaid conduit, and means to move said piston upwardly beyond said conduitto permit communication with the atmosphere through said port.

2. ln apparatus of the character described,

a reciprocatory bar provided with a longitudinal port, a valve carriedby the lower end of the bar to normally close the port, a shoe securedto the lower end of the bar and serving to hold the valve seated, and aninsert from the shoe separate from the valve.

3. n apparatus of the character described, a shoe provided upon one sidewith a depending flange, a coacting plate disposedy in' contact with theopposite side of the shoe, a metallic insert held between the flange andplate, and bolts passing through the shoe and serving to hold the platein place.

4. In apparatus of the character described, a cylinder adapted to besecured to a vehicle and provided near one end with a port havingcommunication with the end of the cylinder and with the atmosphere, apiston mounted to reciprocate within the cylinder and adapted tonormally assume a position adjacent one end thereof, a bar connectedwith the piston to move it, a shoe connected with the bar, means to movethe shoe, an outlet conduit leading into the cylinder upon the side ofthe piston remote from the port when the piston is in the extreme endposition, pressure operated train stopping means connected with theconduit and means actuated by the loosening of the connections by thesaid bar and said shoe for actuating said train stopping means,comprising a port extending through said bar and communicating with theend of the cylinder remote from said first named port, a valve withinthe port to close the same end, a spring extending intermediate saidvalve and said shoe.

5. In apparatus of the character described, a substantially verticalcylinder, a

piston mounted to reciprocate therein and normally held in thelower-most position by pressure within the cylinder, means wherebypressure is exhausted from the cylinder upon the upward movement of thepiston, a reciprocatory bar connected with said piston and provided witha longitudinal port, a valve carried by the lower end of the bar tonormally close the port and a shoe secured to the lower end of the barand serving to hold the valve seated.

6. In apparatus of the character described, a bar provided with a port,a valve carried by the lower end of the bar `to normally close the port,and a shoe secured to the lower end of the bar and serving to hold thevalve seated.

7. In apparatus of the character described, a bar provided with a port,a valve carried by the lower end of the bar to normally close the port,a shoe secured to the lower end of the bar, and a spring extendingintermediate said shoe and said valve, and serving to hold the valveseated.

8. In apparatus of the character described, a shoe provided upon oneside with if) a depending flange, a co-aeting plate disposed inveontaetwith the' opposite side of the shoe, a metallic insert held between theflange and plate, said insert being provided Witha groove in its outerface, and bolts passing through the shoev and serving to hold the platein place.

In testimony whereof l aixmy signature.l

WILLAM B. MURRAY.

